No, unfortunately that is not possible currently. We have no way to expose the object the Silverlight control is bound to yet.
So your goal is to test that custom objects, correct? I believe this goes to the scope of the Unit instead of the UI testing though. Have you considered cover that part of the test scenarios via unit tests?
the Telerik team
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Public Issue Tracking
system and vote to affect the priority of the items